refactor(web): migrate 4 open-coded cover URL sites to coverUrl() helper (C1 small-win)

web/src/lib/components/CompactTrackCard.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import type { TrackRef } from '$lib/api/types';
   import { playQueue, enqueueTrack } from '$lib/player/store.svelte';
-  import { FALLBACK_COVER } from '$lib/media/covers';
+  import { FALLBACK_COVER, coverUrl } from '$lib/media/covers';
   import { Plus } from 'lucide-svelte';
   import LikeButton from './LikeButton.svelte';
   import TrackMenu from './TrackMenu.svelte';
@@ -16,7 +16,7 @@
     index: number;
   } = $props();
 
-  const coverUrl = $derived(`/api/albums/${track.album_id}/cover`);
+  const cover = $derived(coverUrl(track.album_id));
 
   function onImgError(e: Event) {
     (e.currentTarget as HTMLImageElement).src = FALLBACK_COVER;
@@ -42,7 +42,7 @@
   >
     <div class="aspect-square w-full overflow-hidden rounded-md bg-surface-hover">
       <img
-        src={coverUrl}
+        src={cover}
         alt=""
         class="h-full w-full object-cover transition-transform group-hover:scale-[1.03]"
         loading="lazy"